Since the temp here has gotten hot, I am having an issue in my T8 as well. In the winter, I keep my thermostat for the RHP set to 85.4 which generally gives me a 90° hot spot. Cool side is approx 76-78. Now that the house is warmer, my same setting only gives me a hot spot of 87°, but my cool side is now 82-84°. Not very much of a differential. I can boost the set point to get to 90° on the hot side, but then my cool side goes up as well.

Do you recommend I keep my setpoint the same as it is now or turn off my RHP's for the time being. I am in the process of setting up a rack, but that hasn't happened yet. I keep the house at 76° in the summer, but the room the snakes are in stays at 78-80 due to poor cooling.